Austro-Hungarian Navy and SM U-21 (Austria-Hungary)

Austro-Hungarian Navy vs. SM U-21 (Austria-Hungary)

The Austro-Hungarian Navy was the naval force of Austria-Hungary. SM U-21 or U-XXI was a or U-boat built for and operated by the Austro-Hungarian Navy (Kaiserliche und Königliche Kriegsmarine or K.u.K. Kriegsmarine) during the First World War.

Austria-Hungary (Österreich-Ungarn; Osztrák-Magyar Monarchia), also known by other names and often referred to as the Austro-Hungarian Empire in English-language sources, was a constitutional union of the Empire of Austria and the Kingdom of Hungary that existed from 1867 to 1918, when it collapsed as a result of defeat in World War I. The union was a result of the Compromise of 1867 and came into existence on 30 March 1867, when the compromise was ratified by the Hungarian parliament.

The Mediterranean Sea is a sea connected to the Atlantic Ocean surrounded by the Mediterranean region and almost completely enclosed by land: on the north by Southern Europe and Anatolia, on the south by North Africa, and on the east by the Levant.

Pula or Pola (Pola Italian and Istro-Romanian; Colonia Pietas Iulia Pola Pollentia Herculanea; Slovene and Chakavian: Pulj, Polei, Ancient Greek: Πόλαι, Polae) is the largest city in Istria County, Croatia, situated at the southern tip of the Istria peninsula, with a population of 57,460 (2011).

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